summaryrefslogtreecommitdiff
path: root/tools/testing/selftests/kvm/lib/x86_64/ucall.c
diff options
context:
space:
mode:
Diffstat (limited to 'tools/testing/selftests/kvm/lib/x86_64/ucall.c')
-rw-r--r--tools/testing/selftests/kvm/lib/x86_64/ucall.c39
1 files changed, 6 insertions, 33 deletions
diff --git a/tools/testing/selftests/kvm/lib/x86_64/ucall.c b/tools/testing/selftests/kvm/lib/x86_64/ucall.c
index e5f0f9e0d3ee..4d41dc63cc9e 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/ucall.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/ucall.c
@@ -8,52 +8,25 @@
#define UCALL_PIO_PORT ((uint16_t)0x1000)
-void ucall_init(struct kvm_vm *vm, void *arg)
+void ucall_arch_init(struct kvm_vm *vm, vm_paddr_t mmio_gpa)
{
}
-void ucall_uninit(struct kvm_vm *vm)
+void ucall_arch_do_ucall(vm_vaddr_t uc)
{
-}
-
-void ucall(uint64_t cmd, int nargs, ...)
-{
- struct ucall uc = {
- .cmd = cmd,
- };
- va_list va;
- int i;
-
- nargs = min(nargs, UCALL_MAX_ARGS);
-
- va_start(va, nargs);
- for (i = 0; i < nargs; ++i)
- uc.args[i] = va_arg(va, uint64_t);
- va_end(va);
-
asm volatile("in %[port], %%al"
- : : [port] "d" (UCALL_PIO_PORT), "D" (&uc) : "rax", "memory");
+ : : [port] "d" (UCALL_PIO_PORT), "D" (uc) : "rax", "memory");
}
-uint64_t get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc)
+void *ucall_arch_get_ucall(struct kvm_vcpu *vcpu)
{
struct kvm_run *run = vcpu->run;
- struct ucall ucall = {};
-
- if (uc)
- memset(uc, 0, sizeof(*uc));
if (run->exit_reason == KVM_EXIT_IO && run->io.port == UCALL_PIO_PORT) {
struct kvm_regs regs;
vcpu_regs_get(vcpu, &regs);
- memcpy(&ucall, addr_gva2hva(vcpu->vm, (vm_vaddr_t)regs.rdi),
- sizeof(ucall));
-
- vcpu_run_complete_io(vcpu);
- if (uc)
- memcpy(uc, &ucall, sizeof(ucall));
+ return (void *)regs.rdi;
}
-
- return ucall.cmd;
+ return NULL;
}